I home-make my own formula (my son is 3 1/2 mo old) and infant vitamins are a part of the mix, yes... We use Maxi-Baby Infant multi-vitamins, there's a tsp in each batch of formula, which is ... about a days worth for him. Since I couldn't breastfeed and I hate the idea of the smelly powdered canned stuff, we found a recipe we like and he's doing SO WELL... but it needs the vitamins. If I was breastfeeding, I probably wouldn't be using them....